I would note that Timur Kuran distinguishes
between "religious economics" and "the economics
of religion." The former involves trying to
formulate a doctrine of economics that is
consistent with a particular religious viewpoint,
e.g. Islamic economics. The latter supposedly
scientifically studies the impact of religious
conduct or affiliation on economic behavior, e.g.
do religious believers cheat less on their taxes
than non-religious believers?
Barkley Rosser